Quantum Field Theory

Abstract

I discuss the general principles underlying quantum field theory, and attempt to identify its most profound consequences. The deepest of these consequences result from the infinite number of degrees of freedom invoked to implement locality. I mention a few of its most striking successes, both achieved and prospective. Possible limitations of quantum field theory are viewed in the light of its history.

LaTeX, 12 pages, 3 figures. Will appear in Centenary issue of Rev. of Mod. Phys., March 1999. Incorporated minor corrections suggested by editor

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• Computational and Biological Analogies for Understanding Fine-Tuned Parameters in Physics
• What QCD Tells Us About Nature -- and Why We Should Listen
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• Quantum field theory for multipolar composite bosons with mass defect and relativistic corrections
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• General Ether Theory
• Cosmological Constant in Coherent Quantum Gravity
• Reflections on the Spatiotemporal Aspects of the Quantum World
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• States, Modes, Fields, and Photons in Quantum Optics
• Einstein's Geometrical Versus Feynman's Quantum-Field Approaches to Gravity Physics: Testing by Modern Multimessenger Astronomy
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• Some convolution products in Quantum Field Theory
• Fully Symmetric Relativistic Quantum Mechanics and Its Physical Implications
• Volume Renormalization and the Higgs
• Convolution product construction of interactions in probabilistic physical models
• Quantum fields in the non-perturbative regime - Yang-Mills theory and gravity